Safari will likely load the mobile homepage. Tap and hold the in the address bar and select Request Desktop Site .
Note: If you have never owned WhatsApp on that Apple ID, log into a newer iPhone or iPad using your Apple ID, download WhatsApp once to link it to your purchase history, and then return to your legacy device. Method 2: Sideloading IPA Files via Custom Tools whatsapp old version for ios 9.3.6 download
Installing apps from unofficial sources or running unsupported app versions increases security and privacy risk. Prefer Apple’s App Store and files tied to your Apple ID. Safari will likely load the mobile homepage
This is the safest and most reliable method. It keeps you within Apple’s official ecosystem and minimizes security risks. The only requirement is having downloaded WhatsApp previously with your Apple ID. Method 2: Sideloading IPA Files via Custom Tools